Setting variables on PhotonNetwork.Instantiate

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I am creating an object with PhotonNetwork.Instantiate but I need to set some variables that do not change for the lifetime of that object.
PhotonNetwork.Instantiate(GameManager.GetComponent<GameManager>().CurrentSpell, ShootLoc.Loc.position, ShootLoc.Loc.rotation, 0);
For this example, I want to pass in a float called Speed and a location called PlayerLocation.